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SM 25x275 [2xM8] / N42 - magnetic separator
magnetic separator
Catalog no 130294
GTIN/EAN: 5906301812876
Diameter Ø
25 mm [±1 mm]
Height
275 mm [±1 mm]
Weight
1060 g
Magnetic Flux
~ 6 500 Gauss [±5%]
762.60 ZŁ with VAT / pcs + price for transport
620.00 ZŁ net + 23% VAT / pcs
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Physical properties - SM 25x275 [2xM8] / N42 - magnetic separator
Specification / characteristics - SM 25x275 [2xM8] / N42 - magnetic separator
| properties | values |
|---|---|
| Cat. no. | 130294 |
| GTIN/EAN | 5906301812876 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 25 mm [±1 mm] |
| Height | 275 mm [±1 mm] |
| Weight | 1060 g |
| Material Type | Stainless steel AISI 304 / A2 |
| Magnetic Flux | ~ 6 500 Gauss [±5%] |
| Size/Mount Quantity | 2xM8 |
| Polarity | circumferential - 10 poles |
| Casing Tube Thickness | 1 mm |
| Manufacturing Tolerance | ±1 mm |
Magnetic properties of material N42
| properties | values | units |
|---|---|---|
| remenance Br [min. - max.] ? | 12.9-13.2 | kGs |
| remenance Br [min. - max.] ? | 1290-1320 | mT |
| coercivity bHc ? | 10.8-12.0 | kOe |
| coercivity bHc ? | 860-955 | kA/m |
| actual internal force iHc | ≥ 12 | kOe |
| actual internal force iHc | ≥ 955 | kA/m |
| energy density [min. - max.] ? | 40-42 | BH max MGOe |
| energy density [min. - max.] ? | 318-334 | BH max KJ/m |
| max. temperature ? | ≤ 80 | °C |
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
| properties | values | units |
|---|---|---|
| Vickers hardness | ≥550 | Hv |
| Density | ≥7.4 | g/cm3 |
| Curie Temperature TC | 312 - 380 | °C |
| Curie Temperature TF | 593 - 716 | °F |
| Specific resistance | 150 | μΩ⋅cm |
| Bending strength | 250 | MPa |
| Compressive strength | 1000~1100 | MPa |
| Thermal expansion parallel (∥) to orientation (M) | (3-4) x 10-6 | °C-1 |
| Thermal expansion perpendicular (⊥) to orientation (M) | -(1-3) x 10-6 | °C-1 |
| Young's modulus | 1.7 x 104 | kg/mm² |
Table 1: Rod construction
SM 25x275 [2xM8] / N42
| Parameter | Value | Description / Unit |
|---|---|---|
| Diameter (Ø) | 25 | mm |
| Total length | 275 | mm (L) |
| Active length | 239 | mm |
| Section count | 10 | modules |
| Dead zone | 36 | mm (2x 18mm starter) |
| Weight (est.) | ~1026 | g |
| Active area | 188 | cm² (Area) |
| Housing material | AISI 304 | 1.4301 (Inox) |
| Surface finish | Ra < 0.8 µm | Polished |
| Temp. class | 80°C | Standard (N) |
| Force loss (at max °C) | -12.8% | Reversible loss (physics) |
| Force (calculated) | 10.6 | kg (theor.) |
| Induction (surface) | ~6 500 | Gauss (Max) |
Chart 2: Field profile (10 sections)
Chart 3: Temperature performance
Elemental analysis
| iron (Fe) | 64% – 68% |
| neodymium (Nd) | 29% – 32% |
| boron (B) | 1.1% – 1.2% |
| dysprosium (Dy) | 0.5% – 2.0% |
| coating (Ni-Cu-Ni) | < 0.05% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Pros as well as cons of Nd2Fe14B magnets.
Advantages
- Their strength is maintained, and after around ten years it drops only by ~1% (theoretically),
- They are extremely resistant to demagnetization induced by external field influence,
- A magnet with a smooth silver surface looks better,
- They feature high magnetic induction at the operating surface, which increases their power,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Thanks to flexibility in shaping and the capacity to modify to client solutions,
- Wide application in modern industrial fields – they serve a role in HDD drives, electric drive systems, diagnostic systems, and modern systems.
- Thanks to their power density, small magnets offer high operating force, in miniature format,
Limitations
- To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
- Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
- We suggest casing - magnetic mount, due to difficulties in creating nuts inside the magnet and complicated shapes.
- Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which is particularly important in the context of child safety. Furthermore, tiny parts of these magnets are able to be problematic in diagnostics medical when they are in the body.
- With budget limitations the cost of neodymium magnets is economically unviable,
Lifting parameters
Magnetic strength at its maximum – what affects it?
- on a block made of mild steel, optimally conducting the magnetic field
- whose transverse dimension is min. 10 mm
- characterized by even structure
- without the slightest air gap between the magnet and steel
- under axial force vector (90-degree angle)
- at conditions approx. 20°C
Practical aspects of lifting capacity – factors
- Gap (betwixt the magnet and the metal), because even a tiny clearance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to varnish, corrosion or debris).
- Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
- Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
- Steel grade – the best choice is high-permeability steel. Hardened steels may have worse magnetic properties.
- Surface structure – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
- Temperature influence – high temperature weakens pulling force. Too high temperature can permanently demagnetize the magnet.
Lifting capacity was measured by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate decreases the lifting capacity.
Precautions when working with neodymium magnets
Fire risk
Fire hazard: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.
Magnets are brittle
Despite the nickel coating, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.
Compass and GPS
A powerful magnetic field disrupts the functioning of compasses in smartphones and GPS navigation. Maintain magnets near a smartphone to prevent breaking the sensors.
Magnetic media
Device Safety: Neodymium magnets can damage data carriers and sensitive devices (pacemakers, hearing aids, mechanical watches).
This is not a toy
Only for adults. Small elements pose a choking risk, causing intestinal necrosis. Keep away from children and animals.
Health Danger
Patients with a heart stimulator should maintain an absolute distance from magnets. The magnetism can interfere with the functioning of the life-saving device.
Allergic reactions
Some people have a hypersensitivity to Ni, which is the typical protective layer for NdFeB magnets. Frequent touching may cause skin redness. It is best to use protective gloves.
Demagnetization risk
Control the heat. Heating the magnet to high heat will ruin its properties and pulling force.
Finger safety
Danger of trauma: The pulling power is so great that it can result in hematomas, pinching, and even bone fractures. Use thick gloves.
Conscious usage
Before use, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.
Tabela kosztu i czasu dostawy
Płatność przed wysyłką:
GLS kurier
Przesyłka będzie u Ciebie za 2-3 dni
14.99 ZŁ
InPost Paczkomaty 24/7
Przesyłka będzie u Ciebie za 1-2 dni
12.30 ZŁ
Płatność przy odbiorze (pobranie):
GLS kurier
Przesyłka będzie u Ciebie za 1-2 dni
23.00 ZŁ
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